ANSYS Mechanical Introduction to Structural Nonlinearities

This training course covers basic procedures for performing structural nonlinear analyses using the Mechanical Interface.
It is intended for users already familiar with the procedures for performing a linear static analysis in the
Mechanical environment.

In this chapter, general tools and procedures useful for achieving convergence and
post processing results are introduced. These tools are not specific to a particular
source of nonlinearity.
A. Building a Nonlinear Model
B. Obtaining a nonlinear solution
Step Controls
Solver Controls
Restart Controls
Nonlinear Controls
Output Controls
Analysis Data Management
C.
Postprocessing Nonlinear Results

Introduction to Contact
An introduction to solid body contact will be presented in this Lecture:
It is assumed that the user has already covered lecture 2 on General Procedures.
The Specific topics introduced are:
A. Basic concept of contact
B. Contact Formulations
C. Detection Methods
D. Trim Contact
E. Penetration and Slip Tolerances
F. Contact Stiffness
G. Workshop 3A
H. Pinball Region
I. Symmetric vs. Asymmetric
J. Body Types in Contact
K. Postprocessing Contact Results

Rate Independent Plasticity
The following will be covered in this Chapter:
A. Background Elasticity/Plasticity
B. Yield Criteria
C. Flow Rule
D. Hardening Rules
E. Material Data Input
F. Analysis Settings
G. Reviewing Results

Buckling Analysis
A. Background on Structural Stability
B. Linear (Eigenvalue) Buckling Procedure
C. Background on Nonlinear Buckling Techniques
D. Nonlinear Stabilization

Nonlinear Diagnostics
Since some nonlinear structural analyses can be challenging to solve,
understanding how to diagnose non-convergence problems is critical in
obtaining answers.
The following will be covered in this section:
A. Solver Output
B. Monitoring the Solution
C. Newton-Raphson Residuals
D. Example Cases
E. Tips

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